Multi-volume acoustic resonator for rocket engine

A system comprising:

• an acoustic liner comprising a plurality of cavities;
• and
• a first modular damper plug comprising
• a main body comprising a top surface spaced from a bottom surface by a first height, a left surface spaced from a right surface by a width, and an exterior surface spaced from an interior surface by a length, and
• a chamber within the main body extending along a part of the first height, a part of the width, and a part of the length, the chamber communicating with the top surface through an opening, the chamber communicating with the interior surface through one or more ducts,
• the main body sized and shaped to be received in a first cavity of the plurality of cavities of the acoustic liner to form a first acoustic resonator, the chamber comprising an upstream volume of the first acoustic resonator and the one or more ducts communicating with a downstream volume of the first acoustic resonator when the first modular damper plug is received in the first cavity.

A system comprising:

• an acoustic liner comprising a plurality of cavities;
• a first modular damper plug comprising
• a main body comprising a top surface spaced from a bottom surface by a first height, a left surface spaced from a right surface by a width, and an exterior surface spaced from an interior surface by a length, and
• a chamber within the main body extending along a part of the first height, a part of the width, and a part of the length, the chamber communicating with the top surface through an opening, the chamber communicating with the interior surface through one or more ducts,
• the main body sized and shaped to be received in a first cavity of the plurality of cavities of the acoustic liner to form a first acoustic resonator, the chamber comprising an upstream volume of the first acoustic resonator and the one or more ducts communicating with a downstream volume of the first acoustic resonator when the first modular damper plug is received in the first cavity;
• and
• a second modular damper plug comprising
• a main body comprising a top surface spaced from a bottom surface by a first height, a left surface spaced from a right surface by a width, and an exterior surface spaced from an interior surface by a length, and
• a chamber within the main body extending along a part of the first height, a part of the width, and a part of the length, the chamber communicating with the top surface through an opening, the chamber communicating with the interior surface through one or more ducts,
• the main body sized and shaped to be received in a second cavity of the plurality of cavities of the acoustic liner to form a second acoustic resonator, the chamber comprising an upstream volume of the second acoustic resonator and the one or more ducts communicating with a downstream volume of the second acoustic resonator when the second modular damper plug is received in the second cavity.